I have changed the motor oil myself on another car I've owned for years, it makes sense to change it yourself when you have the space and don't mind getting a little dirty, especially if you put lots of mileage in the car. With the RX, I put less than 10k miles on it per year, so at most I'm doing only one oil change every 6 months, and since I don't enjoy getting under a car as much as I used to, I don't mind spending the $90 that the dealer charges for an oil change and tire rotation, plus I get the use of a loaner so inconvenience is at a minimal. It's not a matter of being able to afford it, when I was changing the oil myself I could afford to have the dealer change it, but I prefer to do it myself because I actually get some satisfaction out of it. But things change and now I gladly pay the $90 and don't worry about it for another 6 months.